File: functions.php

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lwat 0.17-4
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<?php
/*
    LWAT, LDAP Webbased Administration Tool
    Copyright (C) 2007 Finn-Arne Johansen <faj@bzz.no> BzzWare AS, Norway

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

/***************************************************************************
 * lwat_login - tries to log in user either given or stored  admindn/adminpw
 * lwat_key      - Reads session key, or create a new one
 * lwat_ldap      - connects to the ldap-server, with proper options set
 * reportLdapError  - Reports error number and textual message of
 *                    ldap error occured
 * loadConfig    - Loads configuration, either from config.php, or use
 *                 predefined values
 * loadLocale    - Checks for browser language and tries to load locale
 * xorstring     - xors a string, to either crypt or decrypt data
 * readKey       - Decodes data posted through the web-browser
 * debug         - Displays data top debug through development
 * pwgen         - generates a random password
 * cryptgen      - generates a crypted password from a given password
 * getnextid     - fetch (and update) the next id to be used. This is
 *                 stored in ldap under ou=variables
 * get_sn        - parses a full name, and fetches the surname
 * chk_username  - Checks if a given username is already taken
 * get_username  - generates a username from a fullname
 * get_givenName - parses a fullname, and extract a givenName
 * get_sambasid  - looks up the sambasid to be used.
 * ldapAddUser   - Adds a user into ldap
 * sambaAddInfo  - Adds samba information for a user
 * userAddGroup  - Add a user into a group
 ***************************************************************************/


require_once ("createlm.php"); 

/**********************************************************************
 * lwat_login      - tries to log in user either given or stored
 *                   admindn/adminpw
 *****************
 * Arguments
 *      ldap    - ldap connection
 *      adminUser - the username to log in as
 *      admindn - password ?
 *      key     - key used to xor the stored password 
 * Returns
 *   authenticated - True if logged in succesfully
 *****************
 * if AdminUser is given
 *   Loop while possible to look closer to base
 *     Try to look up the full dn of the admin user
 *     if found 
 *       try to connect as the admin user
 *       if succesfull
 *          store admindn and admin pw
 *          return true
 *       look closer to the ldap base for a user
 *   return false
 * if no stored admin dn
 *   return failure
 * fetch stored password
 * if able to bind using stored dn/pw
 *   update cookie
 *   return success
 * return failure
 **********************************************************************/
function lwat_login ($ldap, $adminUser, $adminpw, $key) {
    global $base ; 

    if  (!empty ($adminUser)) {
	$loginbase = $base ; 
	$filter = '(|(&(objectClass=posixAccount)(uid=' . $adminUser . '))(&(objectClass=simpleSecurityObject)(cn=' . $adminUser . ')))' ; 
	$want = array ("dn") ; 
	while (!empty ($loginbase)) {
	    $result = @ldap_search($ldap, $loginbase, $filter, $want);
	    $entries = @ldap_get_entries ($ldap, $result); 
	    $admindn = htmlspecialchars($entries[0]['dn']) ; 
	    $bind = @ldap_bind ($ldap, $admindn, $adminpw); 
	    if ($bind) {
		$xorstring = xorstring ($key, $adminpw); 
		$packstring = unpack ("H*", $xorstring) ;
		setcookie ('admindn', $admindn, time () + 1800) ;
		setcookie ('xorstring', $packstring[1], time () + 1800) ;
		return true ; 
	    } else {
		$loginbase = ldap_explode_dn ($loginbase,0) ;
		array_splice ($loginbase, 0,2) ; 
		$loginbase = implode (",", $loginbase) ; 
	    }
	}
	return false ; 
    } 
    $admindn = $_COOKIE['admindn'] ; 
    if (empty ($admindn)) 
	return false ; 
    $packstring = $_COOKIE['xorstring'] ; 
    $xorstring = pack ("H*", $packstring);
    $adminpw = xorstring ($key, $xorstring) ; 
    $bind = @ldap_bind ($ldap, $admindn, $adminpw); 
    if ($bind) {
	setcookie ("admindn", $admindn, time () + 1800) ;
	setcookie ("xorstring", $packstring, time () + 1800) ;
	return true ; 
    }
    return false ; 
}

/**********************************************************************
 * lwat_key      - Reads session key, or create a new one
 *****************
 * Returns
 *   key        - either read from session, or newlyt created
 *****************
 * Read key from session
 * if no key found
 *   create new key
 *   store key in session
 * return key value
 **********************************************************************/
function lwat_key () {
    if (isset($_SESSION['key']))
        $key = $_SESSION['key'] ;
    else {
	$key = substr (crypt(sprintf (gettimeofday (true))),4) ;
	$_SESSION['key'] = $key ; 
    } 
    return $key ; 
}

/**********************************************************************
 * lwat_ldap      - connects to the ldap-server, with proper options set
 *****************
 * Returns
 *   ldap        - ldap connection
 *****************
 * connect to ldap host
 * set ldap options
 * if not tls is available
 *   check error
 *     error 2: tls not available, ignore ?
 *     error 81: unable to contact ldap server
 *     other error:
 *       report ldaperror
 *      
 * if error
 *   close conection
 *   return 0
 * return ldap connection
 **********************************************************************/
function lwat_ldap () {
    global $ldaphost, $tlsRequire ; 

    $ldaperr = 0 ; 
    $ldap=ldap_connect ($ldaphost); 
    ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
    if ($tlsRequire) {
	if (!@ldap_start_tls($ldap)) {
	    $ldaperr = ldap_errno ($ldap) ; 
	    switch ($ldaperr) {
		case 2:
		    printf (_("Unable to start encrypted connection with the ldapserver"), $ldaphost) ;
		    break ;
		case 81:
		    printf (_("Sorry, but we are not able to contact your ldapserver running on the host <B>%s</B>"), $ldaphost) ; 
		    break ;
		default:
		    reportLdapError (ldap_errno ($ldap), "Tried to connect") ;
		    break ;
	    }
	}
    }

    if ($ldaperr) {
        ldap_close ($ldap) ; 
        die ("<BR />" . _("Please check your configuration")) ; 
    }

    return $ldap ; 
}



/**********************************************************************
 * reportLdapError      - Reports error number and textual message of
 *                        ldap error occured
 *****************
 * Arguments:
 *   ldaperr    - Error code from ldap
 *   myAction   - Description of what lead to the error from lwat
 *****************
 * Display an error message to the user
 * Also display links to
 *   search lwat tickets for previously reported errors
 *   create a new ticket with some debug information
 **********************************************************************/
function reportLdapError ($ldaperr, $myAction) {
    printf (_("An Unknown error occured.") . "<BR />") ; 
    printf (_("The error code from ldap was: %d") . "<BR />", $ldaperr) ; 
    printf (_("The error string from ldap was: %s") ."<BR>", ldap_err2str ($ldaperr));
    printf (_("You may <A href='%s' target=_blank>search</A> for the error among the lwat tickets, or if not found, consider <A href='%s'>reporting</A> it"),
        sprintf ("http://lwat.org/cgi-bin/trac.cgi/search?ticket=on&q=%%22Error %d when %s%%22", $ldaperr, $myAction), 
        sprintf ("mailto:trac@lwat.org?subject=Error %d when %s&Body=The error message was:%%0A%s", $ldaperr, $myAction, ldap_err2str($ldaperr))) ;  
}
/***************************************************************************
 * loadConfig    - Loads configuration, either from config.php, or use
 *                 predefined values
 ***********************
 *   Load predefined values
 *   if config.php exists load settings 
 **************************************************************************/
function loadConfig () {
    global $domain, $base, $ldaphost, $homelocation, $useLisGroup, 
           $groupbase, $authbase, $hostbase, $netgroupbase,
           $automountbase, $variablesbase, $uname_maxlen,
           $groupprefix, $authprefix, $hostprefix, $netgroupprefix,
           $automountprefix, $variablesprefix, $uname_prefix, 
           $minPwLength, $minPwUpper, $minPwLower, $minPwNumber,
           $allowPwSet, $tlsRequire, $smarty_templ, $smarty_compile ; 

    $groupprefix = "ou=Group" ;
    $hostprefix = "ou=Hosts" ;
    $netgroupprefix = "ou=Netgroup" ;
    $variablesprefix = "ou=variables" ;
    $automountprefix = "ou=Automount" ;
    $homelocation = "/home" ;
    $minPwLength = 5 ;
    $minPwUpper = 1 ;
    $minPwLower = 1 ;
    $minPwNumber = 1 ;
    $uname_maxlen = 8 ;
    $allowPwSet = false ;
    $smarty_templ = realpath ("../templates") ;
    $smarty_compile = "/var/spool/lwat" ;
    $domain = 'example.net' ; 
    $ldaphost = "ldap";
    $useLisGroup = false ;
    $tlsRequire = true ; 

    @include_once ("/etc/lwat/config.php"); 

    if (!isset ($base)) {
	$base_array = split ('.', $domain) ; 
	$base = 'dc=' . $base_array[0] ; 
	for ($i = 1 ; $i < count($base_array) ; $i++) 
	    $base .= ",dc=" . $base_array[$i] ; 
    }

    if (!is_dir ($smarty_compile))
	$smarty_compile = "/var/tmp" ; 
    if (!is_file ($smarty_templ . "/login.tpl"))
        $smarty_templ = realpath ("../templates") ;
    
    if (isset ($groupbase)) {
        $groupprefix = NULL ; 
    } elseif (isset($groupprefix)) 
	$groupbase = $groupprefix . "," . $base ; 
    else 
	$groupbase = $base ; 

    if ($useLisGroup) {
        $authbase = NULL ; 
        $authprefix = NULL ; 
    } elseif (isset ($authbase)) {
        $useLisGroup = false ; 
        $authprefix = NULL ; 
    } elseif (isset($authprefix)) 
	$authbase = $authprefix . "," . $base ; 
    else 
	$authbase = $base ; 

    if (isset ($hostbase)) 
        $hostprefix = NULL ; 
    elseif (isset($hostprefix)) 
	$hostbase = $hostprefix . "," . $base ; 
    else 
	$hostbase = $base ; 
    
    if (isset ($netgroupbase))
        $netgroupprefix = NULL ; 
    elseif (isset($netgroupprefix)) 
	$netgroupbase =  $netgroupprefix . "," . $base ; 
    else 
	$netgroupbase = $base ; 
    
    if (isset ($variablesbase)) 
        $variablesprefix = NULL ; 
    elseif (isset($variablesprefix)) 
	$variablesbase = $variablesprefix . "," . $base ; 
    else 
	$variablesbase = $base ; 
    
    if (isset ($automountbase)) 
        $automountprefix = NULL ; 
    elseif (isset($automountprefix)) 
	$automountbase = $automountprefix . "," . $base ; 
    else 
	$automountbase = $base ; 
    
}

/****************************************************************************
 * loadLocale    - Checks for browser language and tries to load locale
 ************
 * try to load locale from cookie
 * if no locale is found, and there is a locale subfolder
 *   create array of locales found under locales subfolder
 *   fetch the languages the browser accepts
 *   try to match exactly and mostly the locales for browser and application
 *   if exact locale is found use it
 *   else if match locale is found, use it
 *   if locale to use is found, set cookie
 *   set textdomain to use for locales
 *   set application output to be UTF8
 ****************************************************************************/
function loadLocale () {
    if (isset ($_COOKIE['locale']))
        $found_locale = $_COOKIE['locale'] ;

    if (!isset($found_locale) && is_dir ('../locales')) {
        $handle = @opendir ('../locales') ; 

	$all_locales = array () ; 
	while (false !== ($file = readdir ($handle))) {
	    if (is_dir ('../locales/' . $file . '/LC_MESSAGES')) {
		$all_locales = array_merge ($all_locales, array ($file)) ; 
	    }
	}
	closedir ($handle) ; 
	$lang_accept = array () ; 
	$lang_accept = explode (",", $_SERVER['HTTP_ACCEPT_LANGUAGE']); 
	for ($i = 0 ; $i < count ($lang_accept) ; $i++ ) {
	    $lang_accept[$i] = split(";", $lang_accept[$i]) ; 
	    $lang_accept[$i] = $lang_accept[$i][0] ; 
	}
	if (!empty($lang_accept[0]))
	foreach ($lang_accept as $lang) {
	    if (!isset ($locale_exact)) {
		foreach ($all_locales as $locales) {
		    if ($locales == $lang)
			$locale_exact = $lang ; 
		    elseif (!isset ($locale_match)) {
			if (strpos ($locales, $lang) === 0)
			    $locale_match = $locales ; 
		    }
		}
	    }
	}
	if (isset ($locale_exact)) 
	    $found_locale=$locale_exact ; 
	elseif (isset ($locale_match))
	    $found_locale=$locale_match ; 
	if (isset ($found_locale))
	    setcookie ( 'locale', $found_locale) ;
	unset ($all_locales, $lang_accept, $locale_match, $locale_exact, $lang, $locales) ; 
    }
	
    if (isset ($found_locale)) {
        $locale = setlocale (LC_ALL, $found_locale) ; 
	if (empty($locale)) 
	    setlocale (LC_ALL, $found_locale . ".UTF8"); 
	bindtextdomain ("lwat", "../locales/"); 
	bind_textdomain_codeset ("lwat", "UTF-8");
	textdomain ("lwat"); 
    }
    header('Content-Type: text/html; charset=UTF-8') ;
}

/****************************************************************************
 * xorstring     - xors a string, to either crypt or decrypt data
 *****************
 * Arguments:
 *      key      - key to use when encrypting or decrypting data
 *      xor      - Data to xor, either clear text, or previously encrypted
 * Returns:
 *      either encrypted or decrypted string
 *****************
 * if no key
 *    return nothing
 * perform an xor with every character in string to be encrupted/decrypted
 * with the correspondent charcater in key, repeat key if necesarry
 * if at the end of a keyindex (assume decrypting)
 *   find first occurence of chr 0
 *   return string up to chr 0
 * while not end of keyindex
 *   add with the rest of the key
 * return encrypted string
 ****************************************************************************/
function xorstring ($key, $xor) {
    $keylen=strlen ($key) ; 
    if (! $keylen) return "" ; 
    $newstr="" ; 
    $index=0 ; 
    $keyindex = $index ;
    while ($index < strlen ($xor)) {
        $newstr .= chr(ord($xor[$index]) ^ ord ($key[$keyindex])) ; 
        $index ++ ;
        $keyindex= $index % $keylen ;
    }
    if ($keyindex == 0) {
        $last=strpos ($newstr, chr(0)); 
        if ($last === false) { 
            return $newstr ;
        }
        return(substr ($newstr, 0, $last)) ; 
    }
    while ($keyindex != 0) {
        $newstr .= $key[$keyindex] ; 
        $index ++ ;
        $keyindex= $index % $keylen ;
    }
    return ($newstr) ;
}

/****************************************************************************
 * readKey       - Decodes data posted through the web-browser
 *****************
 * Arguments:
 *      key     - which posted data to read
 * Returns:
 *      the trimmed and stripped value of the data read
 *****************
 * Lookup data in posted array, trim, and remove clean data
 ****************************************************************************/
function readKey ($key) {
    if (isset ($_POST[$key]))
	return htmlspecialchars(trim($_POST[$key])) ; 
    return "" ; 
}

/****************************************************************************
 * debug         - Displays data top debug through development
 *****************
 * Arguments:
 *      mixed   - Data to display (array is preferred
 *****************
 * Display as preformatted code
 ****************************************************************************/
function debug ($mixed) {
    echo "<pre>\n" ; 
    print_r ($mixed);
    echo "\n</pre>\n" ; 
}

/****************************************************************************
 * pwgen         - generates a random password
 *****************
 * Returns:
 *      a password that should be easy to say, but hard to guess
 *****************
 * First define consonants and vowels
 * select random characters, 2 set of three
 * Add a random number between 10 and 99
 ****************************************************************************/
function pwgen(){
    $pw = '';
    $c  = 'bcdfghjkmnprstvwzBCDFGHJKLMNPQRSTVW'; //consonants except hard to speak ones
    $v  = 'aeiouAEU';              //vowels
    $a  = $c.$v;                //both

    //use two syllables...
    for($i=0;$i < 2; $i++){
        $pw .= $c[rand(0, strlen($c)-1)];
        $pw .= $v[rand(0, strlen($v)-1)];
        $pw .= $a[rand(0, strlen($a)-1)];
    }
    //... and add a nice number
    $pw .= rand(10,99);

    return $pw;
}

/****************************************************************************
 * cryptgen      - generates a crypted password from a given password,
 *                 ready to be stored in ldap
 *****************
 * Arguments:
 *      clear   - the clear text password
 * Returns:
 *      a crypted password
 *****************
 * First prepare a salt using md5sum of random data
 * Return base64 encoded sha1 encrypted password
 ****************************************************************************/
function cryptgen($clear){
//prepare a salt
    $salt = md5(uniqid(rand(), true));

    $salt=substr($salt,0,4);
    return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
}

/****************************************************************************
 * getnextid     - fetch (and update) the next id to be used. This is
 *                 stored in ldap under ou=variables
 *****************
 * Arguments
 *      connect - the ldap connection
 * Returns:
 *      the next ID to be used
 *****************
 * Search for a nextID under ou=Variables
 * Loop
 *   minimum nextID should be 10000
 *   if nextID > 59999 
 *     if already looped
 *       Die with an error message
 *     else
 *       set looped
 *       restart from 10000
 *   search ldap for found gidNumber or uidNumber
 *   increase NextID if found
 * until free uidNumber and gidNumber is found
 * build new ID to be stored in ldap
 * if add newID to ldap with success
 *   delete old nextID
 *   rename newID nextID
 *   return nextID
 * die with error message
 ****************************************************************************/
function getnextid ($connect) {
    global $variablesbase, $base ; 

    $looped = false ; 
    $nextID=0 ;
    $want= array ("gidNumber", "uidNumber");
    $filter = "(&(gidNumber=*)(cn=nextID))" ;
    $result= @ldap_search ($connect, "ou=Variables," . $base, $filter, $want);
    if ($result) {
        $entries = ldap_get_entries ($connect, $result) ;
        if ($entries["count"]) 
            $nextID=$entries[0]["gidnumber"][0]  ; 
    }
    do {
        if ($nextID < 10000) $nextID=10000 ;
        else if ($nextID > 59999) {
            if ($looped) {
                die ('Sorry, all user id\'s between 10000 and 59999 seems to have been taken') ;
            } else {
                $looped = true ;
                $nextID=10000 ; 
            }
        } 
	$filter = "(&(|(gidNumber=$nextID)(uidNumber=$nextID))(!(cn=nextID)))" ;
	$result = @ldap_search ($connect, $base, $filter, $want);
	$entries = @ldap_get_entries ($connect, $result) ;
	if ($entries["count"] > 0) $nextID++ ;
    } while  ($entries["count"]) ; 
    $info=array () ;
    $info["objectClass"] = array ("top", "posixGroup") ;
    $info["gidnumber"] = $nextID + 1 ;
    $info["cn"] = "newID" ;
    if (@ldap_add ($connect,"cn=newID," . $variablesbase,$info)) {
        @ldap_delete ($connect,"cn=nextID," . $variablesbase) ;
        @ldap_rename ($connect,"cn=newID," . $variablesbase, "cn=nextID", $variablesbase, true) ;
        return $nextID ;
    } 
    $ldaperr = ldap_errno ($connect) ; 
    switch ($ldaperr) {
        case 50:
            die (_("Sorry, you are not allowed to add users")) ; 
            break ;
	default:
	    reportLdapError ($ldaperr, "getnextid") ; 
	    break ;
    }
    die ("<BR />" . _("Please report a bug to the lwat developers")) ; 
}

/****************************************************************************
 * get_sn        - parses a full name, and fetches the surname
 *****************
 * Arguments:
 *      newname - name to extract surname from
 * Returns: 
 *      surname
 *****************
 * split fullname by spaces
 * find the last name
 * return the last name
 ****************************************************************************/
function get_sn ($newname) {
    $sn="" ;
    $allnames = explode (" ", $newname) ;
    foreach ($allnames as $name) {
        $sn=$name ;
    }
    return $sn;
}

/****************************************************************************
 * chk_username  - Checks if a given username is already taken
 *****************
 * Arguments:
 *      connect - ldap connection
 *      username - Username to check
 *      excludes - username not to use (maybe they are already checked,
 *                 and prepared for other users in an import)
 * Returns:
 *     false if found, true if username can be used
 *****************
 * search ldap for username or groupName
 * if found
 *   return false
 * search trough username which should be excluded
 *   if found, return false
 * return true (actually, return username)
 ****************************************************************************/
function chk_username ($connect, $username, $excludes)  {
    global $base ;

    $filter = "(|(uid=$username)(cn=$username))" ;
    $result= ldap_search ($connect, $base, $filter);
    $entries = ldap_get_entries ($connect, $result) ;

    if ($entries["count"])
	return "" ;

    if (is_array($excludes)) {
        $result = in_array ($username, $excludes) ;  
        if ($result)
	    return "" ;
    }
    return $username ;
}

/****************************************************************************
 * get_username  - generates a username from a fullname
 *****************
 * Arguments:
 *      connect - ldap connection
 *      newname - the fullname to generate a new name from
 *      excludes - username not to be used (already prepared to imported?)
 * Returns: 
 *      new username generated
 *****************
 * try to detect encoding
 * found encoding ISO-8859-1
 *   no need to convert characters
 * default
 *   convert from found charset to ISO-8859-1
 * Look through found characters for known characters > chr 128
 * convert them to A, C, E, I, N, O, U, Y, P (or lowercase variants)
 * convert everything to lower chars
 * split the names based on spaces and other separators
 * find first and last name
 * try taking 3 chars from first and last name
 * check found name against existing
 *   if not found return name
 * loop while vowels
 *   loop while vowels
 *     take 1, then 2, then 3... from each name but firstname
 *     trim from firstname till firstname and X characters from other
 *         names is 8 chars
 *     if username not used, return name
 *     Remove a vowel from "restnames"
 *   Remove a vovel from first name
 *   Try to use 3 from first + 3 from last and add 00-99
 *   if username not used return username
 *   finally give up :( 
 ****************************************************************************/
function get_username ($connect, $newname, $excludes = NULL)  {
    global $base, $uname_prefix ;

    $charset = mb_detect_encoding ($newname, 'UTF-8, ISO-8859-1') ; 
    switch ($charset) {
        case 'ISO-8859-1':
            $basename = $newname ; 
            break ; 
        default:
            $basename = mb_convert_encoding ($newname, 'ISO-8859-1', $charset); 
            break ;
    }
    for ($i=0 ; $i < strlen($basename); $i++) {
        switch (ord($basename[$i])) {
            case 192: case 193: case 194: case 195: case 196: case 197:
                $basename[$i] = "A" ; 
                break ;
            case 199:
                $basename[$i] = "C" ; 
                break ;
            case 198: case 200: case 201: case 202: case 203:           
                $basename[$i] = "E" ; 
                break ;
            case 204: case 205: case 206: case 207:              
                $basename[$i] = "I" ;
                break ;
            case 209 :                          
                $basename[$i] = "N" ;
                break ;
            case 208: case 210: case 211: case 212: case 213: case 214: case 216 :  
                $basename[$i] = "O" ; 
                break ;
            case 217: case 218: case 219: case 220 :              
                $basename[$i] = "U" ; 
                break ;
            case 221 :                          
                $basename[$i] = "Y" ; 
                break ;
            case 222 :                          
		$basename[$i] = "P" ; 
		break ;
            case 223 :                          
		$basename[$i] = "I" ; 
		break ;
            case 224: case 225: case 226: case 227: case 228: case 229 :
		$basename[$i] = "a" ; 
		break ;
            case 231 : 
		$basename[$i] = "c" ; 
		break ;
            case 230: case 232: case 233: case 234: case 235 :
		$basename[$i] = "e" ; 
		break ;
            case 236: case 237: case 238: case 239 :
		$basename[$i] = "i" ; 
		break ;
            case 241 : 
		$basename[$i] = "n" ; 
		break ;
            case 240: case 242: case 243: case 244: case 245: case 246: case 248 :  
		$basename[$i] = "o" ; 
		break ;
            case 249: case 250: case 251: case 252 : 
		$basename[$i] = "u" ; 
		break ;
            case 253: case 255 : 
		$basename[$i] = "y" ; 
		break ;
            case 254 :   
		$basename[$i] = "p" ; 
		break ;
            default: 
               if ($basename[$i] >= "0" and $basename[$i] <= "9")
                   break ;
               if ($basename[$i] >= "A" and $basename[$i] <= "Z")
                   break ;
               if ($basename[$i] >= "a" and $basename[$i] <= "z")
                   break ;
                $basename[$i] = " " ; 
                break ;
	}
    }
    $basename = trim (strtolower ($basename)) ;
    $allnames = split (" +", $basename) ;
    $firstname = $allnames[0] ;
    foreach ($allnames as $name) 
        if (!empty ($name)) $lastname=$name ;
    $bigname = substr ($firstname, 0,3) . substr ($lastname, 0,3) ; 
    $username = chk_username ($connect, $uname_prefix . $bigname, $excludes);
    if (!empty($username)) 
	return $username ;
    $loop="aeiouy" ;
    while (ereg ("[aeiouy]", $loop)) {
        $restname="" ;
        for ($i=1 ; $i < (count($allnames)); $i++)
	    $restname .= $allnames[$i] . " " ; 
	while (ereg ("[aeiouy]", $loop)) {
	    for ($count=1 ; $count <= 6 ; $count++ ) {
		$addname="" ;
		foreach (explode (" ", $restname) as $name)
		    $addname .= substr ($name, 0, $count);
		while (strlen ($addname) > 6)
		    $addname=substr($addname, $count);
		$username= chk_username($connect, $uname_prefix . substr($firstname,0,8 - strlen($addname)) . $addname, $excludes) ; 
		if (!empty($username)) 
		    return $username ;
	    }
	    $length=strlen($restname);
	    $loop="" ;
	    while ($length--) {
		switch ($restname[$length]) {
		    case "a": case "e": case "i": case "o": case "u": case "y":
			$loop=$restname[$length] ;
			$restname=substr($restname, 0,$length) . substr($restname, $length + 1) ;
			$length = 0 ;
			break ;
		}
	    }
	}
	$length=strlen($firstname);
	$loop="" ;
	while ($length--) {
	    switch ($firstname[$length]) {
		case "a": case "e": case "i": case "o": case "u": case "y":
		    $loop=$firstname[$length] ;
		    $firstname=substr($firstname, 0,$length) . substr($firstname, $length + 1) ;
		    $length = 0 ;
		    break ;
	    }
	}
    }
    for ($i=0 ; $i < 100 ; $i++) {
        $username = chk_username ($connect,
                                  $uname_prefix . sprintf ("%s%02d", $bigname, $i), 
                                  $excludes) ; 
        if (! empty($username)) return $username ; 
    }
    echo "Sorry, I'm unable to generate a unique username for $newname<BR>";
    return "" ;
}

/****************************************************************************
 * get_givenName - parses a fullname, and extract a givenName
 *****************
 * Arguments:
 *      newname - The full name 
 * Returns: 
 *      The given name (everything but the last name)
 *****************
 * for each name in full name
 *   add previous name to the given name
 *   remember the last name
 * if no given name is found
 *   use the last name
 * return given name
 ****************************************************************************/
function get_givenName ($newname) {
    $last="" ; 
    foreach (explode (" ", $newname) as $value) {
        $givenName .= $last ;
        $last = "$value" . " " ;
    }
    if (! $givenName) $givenName=$last ;
    return $givenName ;
}

/****************************************************************************
 * get_sambasid  - looks up the sambasid to be used.
 *****************
 * Arguments:
 *      connect - ldap connection
 *      userid  - userid to create sambaSid for
 * Returns: 
 *      the samba sid as a string
 *****************
 * look up a sambaDomain in ldap
 * check number of entries
 *    0: warn that there is none
 *    1: continue
 *    *: warn that there is to many
 ****************************************************************************/
function get_sambasid ($connect, $userid) {
    global $base ;
    $want= array ("sambasid");
    $filter = "(objectClass=sambaDomain)" ;
    $result = @ldap_search ($connect, $base, $filter, $want);
    $entries = @ldap_get_entries ($connect, $result) ;
    switch ($entries["count"]) {
        case 0:
            die (_("Sorry, can't find no sambaDomain in your ldap"). "<BR>") ; 
        case 1: break ; 
        default:
            die (_("Sorry, there is more than one sambaDomain in your ldap server, and this version of lwat only supports one"). "<BR>") ; 
    }
    $sambaSID=$entries[0]["sambasid"][0] . sprintf("-%d", $userid * 2 + 1000)  ; 
    return $sambaSID ;
}

/****************************************************************************
 * ldapAddUser   - Adds a user into ldap
 *****************
 * Arguments:
 *      ldap     - ldap connection
 *      cn       - Common name of the new user
 *      template - Template to use to create user
 *      username - The username 
 *      userpw   - password
 *      groups   - list of groups (in addition to those from the template)
 *                 to add the user into
 * Returns: 
 *      returns true if the user was created, false otherwise
 *****************
 * parse template file
 * fetch surname from username
 * fetch the next userid to use
 * check if special lis schema should be used when creatign a personal group
 * Set up to replace username, basem domain and surname with real values
 * Parse template, to build a complete ldap object
 *   ou: this is the objectunit which the object is stored under
 *   groups: add these groups from the template to the list of groups
 *           for the user
 *   objectClass: this must be added as an array
 *   *) the rest is just added as normal key => value stuff
 * if samba Account
 *   Add samba Info
 * Add the user
 * report any error
 * if lisGroup are to be used, set groupbase
 * add personal group 
 * for each group the user should be added into
 *   if unable to add
 *      remember
 * if not unable to add to any group
 *   return success
 * Remove all groups we could not add the user into
 * return success
 ****************************************************************************/
function ldapAddUser ($ldap, $cn, $template, $username, $userpw, $groups) {
    global $groupbase, $base, $domain, $useLisGroup ; 

    $templates = parse_ini_file ('/etc/lwat/admin.ini', true) ; 
    $template = $templates[$template] ;
    $sn = get_sn ($cn) ;
    $userid = getnextid ($ldap) ;
    $userldif['uidNumber'] = $userid ;
    $userldif['gidNumber'] = $userid ;
    $userldif['uid'] = $username ;
    $userldif['cn'] = $cn ;
    $userldif['userPassword'] = cryptgen($userpw) ;
    if ($useLisGroup === true) {
	$groupldif["objectClass"] = array ("top", "posixGroup", 'lisGroup') ; 
	$groupldif["groupType"] = "private" ;
    } else
	$groupldif["objectClass"] = array ("top", "posixGroup") ; 
    $groupldif["cn"] = $username ; 
    $groupldif["gidNumber"] = $userid ;
    $groupldif["description"] = "$cn personal group" ;
    $replace=array("%username%", "%base%", "%domain%", "%sn%") ;
    $replacewith =array($username, $base, $domain, $sn) ;
    foreach ($template as $key => $value) {
        $value = str_replace ($replace, $replacewith, $value) ;
        switch ($key) {
             case "ou":
                 $ou=$value ;
                 break ;
             case "groups":
                 if (is_array ($groups)) 
		     $groups = array_merge ($groups, explode (" ", $value)) ;
		 else
		     $groups =  explode (" ", $value) ;
                 break ;
             case "objectClass":
                 $userldif['objectClass'] = explode (" ", $value); 
                 break ;
             default:
                 $userldif[$key] = $value ;
                 break ;
        }
    }
    if (in_array ('sambaSamAccount',$userldif['objectClass'])) 
        $userldif = (array_merge($userldif, sambaAddInfo ($ldap, $userldif, $userpw))) ;
    if (!@ldap_add($ldap, "uid=" . $username . "," . $ou, $userldif)) {
        $ldaperr = ldap_errno ($ldap) ; 
        switch ($ldaperr) {
            case 68:
                die (sprintf (_("The username %s already exists"), $username)) ; 
            default: 
		reportLdapError (ldap_errno ($ldap), "Add user") ;
		break ;
        }
        return false; 
    }
    if ($useLisGroup) $ou=$groupbase ;
    if (!@ldap_add($ldap, "cn=" . $username . "," . $ou, $groupldif)) {
        printf (_("Failed to add personal group for ") . $cn . "<BR>") ; 
    }
    $nogroup = array () ; 
    foreach ($groups as $group) {
        $filter="(&(objectClass=posixGroup)(cn=" . $group . "))";
        $want = array ('gidNumber'); 
        $result = ldap_search($ldap, $groupbase, $filter, $want);
        $entries = ldap_get_entries ($ldap, $result);
        $gid= $entries[0]['gidnumber'][0] ;
        if (!userAddGroup ($ldap, $username, $gid)) 
            $nogroup[] = $group ; 
    }
    if (empty($nogroup)) return true ; 
    foreach ($nogroup as $group) {
        $pos = in_array ($group, $groups) ; 
        if (isset ($pos)) 
           array_splice ($groups, $pos - 1  , 1) ; 
    }
    return true ; 
}

/****************************************************************************
 * sambaAddInfo  - Adds samba information for a user
 *****************
 * Arguments:
 * Returns: 
 *****************
 * FIXME describe this function (and other not described  functions in this file
 ****************************************************************************/
function sambaAddInfo ($ldap, $userldif, $userpw) {
    $sambahash = new smbHash () ;
    $sambaldif = array ()  ;
    $sambaldif['sambaSID'] = get_sambasid ($ldap, $userldif['uidNumber']) ;
    $sambaldif["sambaAcctFlags"] = "[U          ]" ;
    $sambaldif["sambaLMPassword"] = $sambahash->lmhash($userpw) ; 
    $sambaldif["sambaNTPassword"] = $sambahash->nthash($userpw) ; 
    return $sambaldif ;
}

/****************************************************************************
 * userAddGroup  - Add a user into a group
 *****************
 * Arguments:
 * Returns: 
 *****************
 * FIXME describe this function (and other not described  functions in this file
 ****************************************************************************/
function userAddGroup ($ldap, $uid, $gid) {
    global $groupbase, $base ; 
    $filter="(&(objectClass=posixGroup)(gidNumber=" . $gid . "))";
    $want = array ('cn'); 
    $searchbase=$groupbase ; 
    $result = ldap_search($ldap, $searchbase, $filter, $want);
    $entries = ldap_get_entries ($ldap, $result);
    $groupdn=$entries[0]["dn"] ; 
    $cn=$entries[0]["cn"][0] ; 
    $change = array (); 
    $change["memberUid"][] = $uid ; 
    if (!@ldap_mod_add($ldap, $groupdn, $change))
        return false ; 
    $filter="(&(member=*)(cn=" . $cn . "))";
    $result = ldap_search($ldap, $base, $filter, $want);
    $entries = ldap_get_entries ($ldap, $result);
    $groupdn=$entries[0]["dn"] ; 
    $change = array (); 
    if ($entries[count]) {
        $want = array (); 
	$filter="(&(objectClass=posixAccount)(uid=" . $uid  ."))";
	$result = ldap_search($ldap, $base, $filter, $want);
	$entries = ldap_get_entries ($ldap, $result) ; 
	$change["member"][] = $entries[0]["dn"] ; 
	@ldap_mod_add($ldap, $groupdn, $change) ;
    }
    return true ; 
    
}


?>